Replace reduction script if sample script is outdated

[Alex Buts]

Logical bug has been identified in operating isis configuration script.

If sample script have changed and previous configuration script existed, the reduction script remains untouched.

The sample reduction script should be replaced by new one if user have not touched it and sample reduction script have changed.

[Alex Buts]

Re #11886 This should fix the issue.

Changeset: d70c2f52194964e7862378d01034d3c31f088ec1

[Alex Buts]

Release Notice:

This is minor bugfix to autoconfiguration scrip which runs on ISIS analysis machines and creates user environment for new users.

Part of work for improving the logic of working with this script.

If newer version of the script appears in source repository, the previously untouched sample scripts will be replaced.

[Alex Buts]

Re #11886 Do not replace old configs and Pylint warnings

Changeset: 55038a0444377f18ee5edd0637821229bfc56a64

[Alex Buts]

Re #11886 Should fix unit test on Unix

and better logic behind replacing sample file.

Changeset: 7fb7b1d53ffccb710dd22a4bd2918dbde039ceec

[Alex Buts]

Fixed as PR ​https://github.com/mantidproject/mantid/pull/842. See notes there on how to test.

[Federico Montesino Pouzols]

The changes are tested and well documented, they look fine. Let's merge this fix in so users can check it.

The only issue that I could find is that there are some 15 pylint warnings in ISISDirecInelasticConfig.py (some of them are trivial to fix nitpicky thingies, like trailing spaces). But this has not been introduced in this branch, so let's merge the fix in.

[Federico Montesino Pouzols]

Merge pull request #842 from mantidproject/11886_ReplaceSampleReductionForUsers

Replace sample users script by its updated version if present

Full changeset: ​65a45cd1b6e7ee6d63d027f6df4858d769c04f0f

[Stuart Campbell]

This ticket has been transferred to github issue ​12724